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AssigneeKomatsu Ltd.
InventorsTakemori Takayama, Tetsuo Ohnishi, Kazuo Okamura
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To provide a thermal spray membrane contact material, contact member and contact part and an apparatus to which they are applied, showing excellent seizure resistance and wear resistance even under high surface pressure/low speed sliding, high speed/high temperature sliding, or high surface pressure/high speed sliding. In a bucket connecting apparatus connecting an arm and a bucket by a work implement connecting pin, the above-mentioned work implement connecting pin comprises a base material made of steel having an axis function and a contact surface formed of a thermal spray membrane contact material film-formed on the base material, said contact surface being placed at least on a supported surface site of the work implement connecting pin relative to a bracket and on a slipping contact surface with a work implement bushing, further, said thermal spray membrane contact material being composed of a Mo metal phase, or 10 vol % or more of a Mo metal phase and a metal phase and/or alloy phase containing one or more elements selected from the group consisting of Fe, Ni, Co, Cr, Cu and Zn.
A connecting apparatus comprising a first machine constituent element on a first side connected to a second machine constituent element on a second side placed via a supporting axis supported by the first machine constituent element on the first side and a bearing bushing outer-engaged on the supporting axis so that the first machine constituent element and the second machine constituent element are mutually revolvable or rotatable, wherein said supporting axis is made of a contact member in which a contact surface of a contact part base material of an apparatus having a rotation contact mechanism and/or a linear contact mechanism is formed of a thermal spray membrane contact material comprising a Mo metal phase, or 5 vol % or more of a Mo metal phase and another metal phase containing one or more elements selected from the group consisting of Fe, Ni, Co, Cr, Cu, Zn and alloys thereof, as a constituent material, and said bearing bushing is constituted of a sintered material of a Fe—C-based alloy, a Fe—C—Cu-based alloy or a Cu—Sn-based alloy, said sintered material having a content of pores of 5 to 30 vol %, in which the pores are filled with a lubricating oil or a lubricant composition, or is constituted of a sintered material of a Fe—C-based alloy, a Fe—C—Cu-based alloy or a Cu—Sn-based alloy, said sintered material having a content of pores of 5 to 30 vol %, in which the pores are filled with a lubricating oil or a lubricant composition, and a solid lubricant is dispersed therein.
A connecting apparatus comprising a first machine constituent element on a first side connected to a second machine constituent element on a second side placed via a supporting axis supported by the first machine constituent element on the first side and a bearing bushing outer-engaged on the supporting axis so that the first machine constituent element and the second machine constituent element are mutually revolvable or rotatable, and having a thrust bearing which bears and supports a thrust load acting between said first machine constituent element on the first side and said second machine constituent element on the second side, wherein said supporting axis is made of a contact member in which a contact surface of a contact part base material of an apparatus having a rotation contact mechanism and/or a linear contact mechanism is formed of a thermal spray membrane contact material comprising a Mo metal phase, or 5 vol % or more of a Mo metal phase and another metal phase containing one or more elements selected from the group consisting of Fe, Ni, Co, Cr, Cu, Zn and alloys thereof, as a constituent material, and said bearing bushing is constituted of a sintered material of a Fe—C-based alloy, a Fe—C—Cu-based alloy or a Cu—Sn-based alloy, said sintered material having a content of pores of 5 to 30 vol %, in which the pores are filled with a lubricating oil or lubricant composition, or is constituted of a sintered material of a Fe—C-based alloy, a Fe—C—Cu-based alloy or a Cu—Sn-based alloy, said sintered material having a content of pores of 5 to 30 vol %, in which the pores are filled with a lubricating oil or lubricant composition, and a solid lubricant is dispersed therein.
Dependencies are inferred from the claim text.